Tractism

Tractism was an artificial force generated using hollow nuclei. Tractism was loosely related to both Electromagnetism and Gravity, and it was able to move any object - regardless of it's magnetic or electric charge.

There were two "charges" of tractism: Positive and negative. Negative tractism created a repulsive "pushing" force, whilst positive tractism created an attractive "pulling" force.

The force of tractism was a technological staple of any advanced society, as it was the basis of various essential technologies, including repulsorlifts, gravity generators, momentum compensators, hovercranes and many more.